first attempt to plumb fast blur code into skia mask filter

src/effects/SkBlurMask.h

Index: src/effects/SkBlurMask.h
diff --git a/src/effects/SkBlurMask.h b/src/effects/SkBlurMask.h
index 5179b4b2b7d31bd9d514bf478b14a1e53bff27b3..4849ee77a9e56061dc0b549949c3baf199a07ee6 100644
--- a/src/effects/SkBlurMask.h
+++ b/src/effects/SkBlurMask.h
@@ -11,6 +11,7 @@
 #define SkBlurMask_DEFINED
 
 #include "SkShader.h"
+#include "SkMask.h"
 
 class SkBlurMask {
 public:
@@ -30,7 +31,8 @@ public:
 
     static bool BlurRect(SkMask *dst, const SkRect &src,
                          SkScalar radius, Style style,
-                         SkIPoint *margin = NULL);
+                         SkIPoint *margin = NULL, 
+                         SkMask::CreateMode createMode=SkMask::kComputeBoundsAndRenderImage_CreateMode);
     static bool Blur(SkMask* dst, const SkMask& src,
                      SkScalar radius, Style style, Quality quality,
                      SkIPoint* margin = NULL);